<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <!-- 添加角色按钮区域 -->
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table :data="rolelist" border stripe>
        <el-table-column type="expand" label="更多">
          <template #default="scope">
            <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)"> {{item1.authName}}</el-tag><i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级权限 -->
              <el-col :span="19">
                <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <!-- 通过for循环嵌套耳机 -->
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)"> {{item2.authName}}</el-tag><i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                      {{item3.authName}}
                    </el-tag><i class="el-icon-caret-right"></i>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <pre>{{scope.row}}</pre>
          </template>
        </el-table-column>
        <!-- 索引 -->
        <el-table-column type="index" label="#">
        </el-table-column>
        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template #default="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVIsible" width="50%" @close="setRightDialogClosed">
      <el-tree ref="treeRef" :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVIsible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  name: 'Roles',
  data() {
    return {
      //角色列表数据
      rolelist: [],
      //控制分配权限对话框的显示与隐藏
      setRightDialogVIsible: false,
      rightslist: [],
      treeProps: {
        children: 'children',
        label: 'authName',
      },
      //默认选中的数组
      defKeys: [],
      roleId: '',
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200)
        return this.$message.error('获取用户列表失败')
      this.rolelist = res.data
      console.log(this.rolelist)
    },
    async removeRightById(role, rightId) {
      //弹框是否要删除
      const confirmRrsult = await this.$confirm(
        '此操作将删除此权限, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      if (confirmRrsult !== 'confirm') return this.$message.info('取消了删除')
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      role.children = res.data
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
      //获取所有权限的数据
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200)
        return this.$message.error('获取权限数据失败')
      this.rightslist = res.data
      console.log(this.rightslist)
      //获取三级节点
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVIsible = true
    },
    //通过递归的形，获取所有角色的三级权限
    getLeafKeys(node, arr) {
      if (!node.children) {
        //如果当前node节点不包含children则是三级节点
        return arr.push(node.id)
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr))
    },
    setRightDialogClosed() {
      this.defKeys = []
    },
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('分配失败')
      }
      this.$message.success('分配成功')
      this.getRolesList()
      this.setRightDialogVIsible = false
    },
  },
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>